A paper test for occult blood in faeces using ortho-dianisidine.
D001713:Biphenyl Compounds; D005243:Feces / Q000032:analysis*; D006801:Humans; D007202:Indicators and Reagents; D008551:Melena / Q000175:diagnosis; D009780:Occult Blood
D001713:Biphenyl Compounds; D007202:Indicators and Reagents